Chapter 17 Summary and Analysis: The Weight of Unspoken Histories

!!! SPOILER WARNING !!!

This page contains major spoilers for Chapter 17 of Identity Unknown by Patricia Cornwell. If you have not read through this chapter, bookmark this analysis and return later.

Summary

Kay Scarpetta and Pete Marino fly east in the Doomsday Bird, transporting Sal Giordano's body in a plastic pouch on the cabin floor. Marino admits he is bothered by death in ways he once was not, and Scarpetta reflects that when they started their careers, they believed death would not touch them personally—a denial she says Marino still clings to. A rainbow briefly appears, which Scarpetta interprets as a reassuring sign from Sal, though Marino darkly jokes about crashing at the end of it.

Marino confronts Scarpetta about her summer in Rome, revealing long-held knowledge of her romantic relationship with Sal. He discloses that he overheard her on a bulky mobile phone at a Gilpin Court homicide scene, telling someone she missed him. Scarpetta finally confirms what Marino suspected for years. His hurt surfaces—not only that she kept the relationship secret, but that she left for Italy without saying goodbye, a departure he learned of through Style magazine.

Scarpetta retreats into vivid memories of rooftop nights with Sal in Rome: barefoot on ancient stone steps, wine, telescope viewings of Jupiter and Saturn, his prophetic conviction that planets existed beyond the solar system before science confirmed it. She remembers his phrase the enchanted hour and his description of his body as a spacesuit.

The helicopter passes over Richmond landmarks, then Colonial Williamsburg, and finally lands at NASA Langley Research Center. Armed soldiers in tactical gear, a K-9 unit, and drones greet them. Scarpetta texts Benton, who already seems to know about the difficult flight. She privately thinks of Carrie Grethen as a human virus that mutates into crueler variants, wishing she would die.

Key Events

Mortality Confession: Marino admits to Scarpetta that death now troubles him deeply, marking a shift from his earlier hardened demeanor.
The Rainbow: A brief rainbow appears, which Scarpetta interprets as a message from Sal—"a good sign"—though Marino undercuts the moment with gallows humor.
Marino's Revelation: Marino confronts Scarpetta about her secret Roman romance, revealing he overheard her telling Sal "I missed him" at a drive-by shooting scene years ago.
Rome Flashback: Scarpetta recalls rooftop evenings with Sal in vivid sensory detail—wine, telescope, marble sculptures, the scent of primrose and phlox.
Carrie Grethen Reflection: Scarpetta internally describes Grethen as a virus that cannot be eradicated, only to mutate into something worse.
Benton Text Exchange: Scarpetta texts Benton, who already knows about the flight's difficulties and asks about Marino's condition.
NASA Langley Arrival: The Doomsday Bird lands at NASA's oldest campus under heavy military escort, with K-9 checks and drone surveillance.

Character Development

Kay Scarpetta The chapter exposes the depth of Scarpetta's emotional compartmentalization. She struggles to keep grief "walled off" while flying beside Sal's body, yet her memories of Rome break through with remarkable vividness. Her admission to Marino—that she cared for Sal very much—is as close to vulnerability as she permits. Her silent wish for Carrie Grethen's death reveals a hardened edge born of years of trauma.

Pete Marino Marino's emotional rawness defines this chapter. He confesses fear of death that once seemed impossible for him. His confrontation about Italy is layered: anger at being excluded, jealousy he has never voiced, and genuine protectiveness. When he mutters "settle," he inadvertently reveals lingering dissatisfaction with his life choices, a vulnerability Dorothy must never discover.

Sal Giordano (in memory) Though deceased, Sal emerges through Scarpetta's memories as a romantic, intellectually visionary figure—convinced of exoplanets before their discovery, poetic about the body as a spacesuit. His selfishness is acknowledged but not dwelt upon.

Themes, Symbols, or Motifs

The Body as Container Sal's description of his body as a spacesuit resonates throughout the chapter. Scarpetta sees his corpse as something he has moved on from, a discarded vessel. This motif connects to the NASA destination—a place built on the idea that humans can transcend earthly bodies through technology.

The Rainbow A fleeting symbol Scarpetta desperately wants to read as reassurance. Its rapid disappearance and Marino's cynical response underscore the chapter's tension between hope and grim reality.

Denial and Disclosure Scarpetta and Marino both built careers on confronting death while believing themselves immune. The chapter systematically strips away those protections—Marino admits fear, Scarpetta admits love—forcing long-buried truths into the open.

Carrie Grethen as Virus Scarpetta's metaphor for Grethen—a mutating pathogen—frames their antagonist as systemic rather than individual, something that adapts and persists regardless of efforts to contain it.

Why This Chapter Matters

Chapter 17 is the emotional fulcrum of the novel's middle act. While the investigation propels the plot forward, this chapter pauses for an extended, claustrophobic conversation that recontextualizes decades of Scarpetta-Marino history. Marino's exposure of her Roman secret is not new information for him, but the confrontation is new—and it changes their dynamic by forcing acknowledgment where avoidance once ruled.

The chapter also deepens the mystery through misdirection. The NASA destination, the military escort, and the secrecy from Lucy and Tron all suggest that Sal's death connects to something far larger than a single murder. Scarpetta's internal linking of Sal's body to Carrie Grethen frames the coming revelations within a broader pattern of evil she cannot escape.

Structurally, the chapter operates as a bridge: departing the crime scene, processing grief, and arriving at a location that promises answers the reader does not yet have.

Study Questions and Answers

Why does Marino choose this moment to confront Scarpetta about her Roman relationship with Sal?

Marino has been carrying this knowledge for years, but the immediacy of Sal's death—and Scarpetta's visible grief—breaks his restraint. He frames the confrontation as protective: he wants "full disclosure" so the secret cannot be weaponized against her. But his own hurt is unmistakable, suggesting the confrontation is as much personal as professional.
What does the NASA Langley destination suggest about the scope of the investigation?

The heavily militarized reception—K-9 units, drones, tactical soldiers—indicates Sal's death intersects with national security interests. NASA Langley's historical connection to moon-landing training and aerospace research implies the conspiracy involves technology, space, or advanced weaponry, elevating the case beyond a standard homicide.
How does Scarpetta's memory of Sal's rooftop teachings reflect her current state of mind?

Her recollection of Sal pointing out dry lakes and craters on the moon—and his certainty about undiscovered planets—mirrors her present search for truth in darkness. Sal taught her to see what was not yet visible, a skill she desperately needs now. The memory also reveals that their bond was intellectual and philosophical as much as romantic, which deepens her loss.